Apparatus for producing chilled castings



I 2 Sheets-Sheet 1. J. SEAMAN.

Apparatus for Producing Chilled Castings.

No. 236,185. PatentedJ'an. 4,1881.

w I By his .flttorneys N.PEIERS, PHoTp-LgTHoGmPHER. WASHXNGTON. D Q

2. Sheets-Sheet 2.

- J. SEAMAN. Apparatus for Producing Chilled Castings. No. 236,185. X Patented Jan. 4,1881.

By his .Atforneys N, PETERSv PHOTO-LITHDRRAPNER. WASHXNGTON, D c.

UNITED STATES ATENT FFICE- JOSEPH SEAMAN, OF CHICAGO, ILLINOlS.'

APPARATUS FOR PRODUCING CH'ILLED CASTINGS.

SPECIFICATION forming part of Letters Patent No. 236,185, dated January 4, 1881 I Application filed January 28, 1880.

To all whom it may concern:

Be it known that I, JosEPH SEAMAN, of Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in the Artof Manufacturing Chilled Castings and in Apparatus therefor, of which the following is a specification.

My objects are to produce perfectly and evenly chilled castings for various purposes, particularly mold-boards and other wearing parts of plows, cultivator shovels and teeth, and the different parts of agricultural implements or other machines, which parts are subjected to excessive wear, and to make such castings of soft, strong iron, and possessing to the fullest extent the desirable qualities of hardness and toughness.

I employ a hollow chill-block, so constructed and used that at the same moment the molten metal is poured against the previously-warmed face thereof the part that forms the casting) cold water is forced into the hollow of the chillblock so as to play with a continuous force over the entire inner surface of the face of the chillblock. The water is allowed to escape from the hollow chill-block about as fast as it is forced into the same. This continuous supply of water forms an even and perfect chill to the casting, an end which cannot be attained by merely filling the block with cold water, nor simply by a flow of water, as heretofore employed, without the preliminary step of warming the chill-block, and so removing all moisture from its face. I use steam to Warm up the chillblock before commencing to pour the castings.

The subject-matter claimed will hereinafter specifically be designated.

My improvements will now be described by the aid of the accompanying drawings, in which is shown so much of a suitable apparatus for the manufacture of mold-boards as is deemed necessary to illustrate my invention.

Figure 1 is a view, in elevation, with parts broken away, as seen from the front, the apparatus being in the position to which it is adjusted just before casting. Fig. 2 is a vertical section on the line 2 2 of Fig. 3. Fig. 3 is a rear elevation, with some parts broken away and others in section; and Fig. 4 a horizontal section on the line 4: 4, Fig. 3.

Ahollow chill-block, A, is hung by hollow journals B B in a suitable framing or standards, O C, so as to turn and be capable of adjustment vertically, as desired. The face of the chill-block is of the proper size and shape to give the desired form to the mold-boards, or whatever castings are to be made, and changes are intended to be made to suit the various classes of work. The hollow journal B-serves as the inlet for steam and water alternately to the chill-block, as will be explained hereinafter.

The steam enters by way of the inlet-pipe b and the water by the inlet-pipe 1). Both these pipes are provided with suitable cocks to shut off the flow of steam and water, as desired, and connect with their respective sources of supply in a suitable way.

The outlet-journal B is provided with a proper discharge-pipe, D, and cock. Blow-off or waste-cocks (Z d are also provided at the ends of the chill-block A. A one-part flask, E, in which the mold is formed, is properly secured to the chill-block, so that the latter in reality forms the cope of the flask.

Any suitable number of flasks are provided, and a rammin g-up block or molding-block, the duplicate of the chill-block, with the pattern affixed, is employed, as will be readily understood.

A flask, E, containing the sand-mold, having been properly fitted and cramped firmly to the chill-block while in a horizontal position, and the chill-block then turned. about a quarter round to bring it and the flask upright, and the sprue or runner having been provided, the operation is as follows: The face of the chill-block being warmed up with steam and the outlet-pipe opened, the metal is poured into the mold. At the same moment the cock in the water-inlet pipe is opened, and water under pressure admitted to the chill-block, forcing out the steam instantly. By means of the perforated pipes Fin the block the water is distributed and caused to play in an instant all overthe inner surfaceot' the face of the chillblock with a continuous flow as it passes off at the outlet. This gives the desired sudden cooling or electric-like shock, and causes the chill to the metal on the opposite side of the face while in a liquid state. The face of the block being about seven-sixteenths of an inch thick,

in a few seconds the metal is set, and the casting, with the flask, ready to be removed to the cooling-oven, as usual. Immediately another flask is adjusted to the chill-block in place of that removed, and the operation of casting repeated.

By giving sufficient pressure to the water with the required coldness the mold-boards or other thin castings can be chilled entirely through.

I do not claim separately or independently of each other the heating of a chill-block by steam or otherwise, and the cooling thereof by water, nor, broadly, the cooling by a flow of water. Neither do I wish to be understood as confining my invention to the employment of the identical apparatus shown and described, as various modifications in details thereof may be made. For instance, a double passage may be made in one of the trunnions, so that both the inlet and outlet for steam and water maybe by the one trunnion, and the chill-block maybe hung at one end instead of about at its middle, and counterbalanced or supported in a proper manner to prevent its tendency to tip. Heated air or gases may be used instead of steam, and the internal perforated pipes multiplied, or even dispensed with. I however prefer the apparatus shown.

I claim as my own invention 1. The combination of the hollow chillblocl; provided with journals, by which it is supported so as to be capable of rocking in its bearings, and the steam and water inlet pipes provided with cocks and communicating with the chill-block, substantially as and for the purposes hereinbefore set forth.

2. The tubularjournals, in connection with chill-blocks, one ot'whiehjournals serves as an inlet-pipe for the supply of steam and water, or their equivalents, as tempering mediums, the other tubular journal serves as an escape-pipe, substantially as hereinbet'ore described and set forth.

3. The chill, having a chamber, in combination with a supply-pipe and a perforated cross-pipe, as and for the purpose of equally diffusing the tempering medium onto the back of the chill.

In testimony whereof I have hereunto subscribed my name.

JOSEPH SEAMAN.

\Vitnesses:

A. M. GRIFFEN, Z. 'I. GRIFFEN. 

